In 1948, Hermann Bondi collaborated with Fred Hoyle and Thomas Gold to formulate the steady state theory, proposing a universe that expands while continuously creating matter to maintain constant density. This cosmological model served as a prominent alternative to the Big Bang theory, establishing a framework that influenced scientific inquiry throughout the mid-twentieth century.
Early Development and Education
Born in Vienna in 1919, Bondi displayed early mathematical ability and relocated to England in 1937 to study at Trinity College, Cambridge. During his time there, he achieved the distinction of Senior Wrangler. His early career included lecturing at the University of Cambridge from 1945 to 1954 and holding fellowships at Trinity College.
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Beyond his work on steady state theory, Bondi significantly contributed to general relativity. He was a pioneer in analyzing the interaction of negative mass and correctly identified the nature of gravitational radiation. He introduced several concepts now standard in the field, including Bondi radiation coordinates, the Bondi k-calculus, and Bondi accretion. He viewed his 1962 research regarding gravitational waves as his most significant scientific achievement.
Public Service and Academic Leadership
Bondi transitioned from purely academic roles to major policy and administrative positions. He served as the Director General of the European Space Research Organisation from 1967 to 1971. His government service included roles as Chief Scientific Adviser to the Ministry of Defence and the Department of Energy. He also served as the Master of Churchill College, Cambridge, from 1983 to 1990.
Humanism and Personal Life
A lifelong adherent to atheism and a proponent of humanism, Bondi served as president of both the British Humanist Association and the Rationalist Press Association starting in 1982. He married fellow mathematician Christine Stockman in 1947, and they had five children. Bondi died in Cambridge in 2005, and his remains were committed to cremation.
Fast facts
- Born: 1919, Vienna
- Died: 2005, Cambridge
- Fellow of the Royal Society: 1959
- Knight Commander of the Order of the British Empire: 1973
- Albert Einstein Medal: 1983
- IMA Gold Medal: 1988
- Gold Medal of the Royal Astronomical Society: 2001
- Citizenship: United Kingdom
Questions readers ask
What was Bondi's primary contribution to cosmology?
He co-developed the steady state theory, which posits that the universe maintains a constant average density as it expands due to the continuous creation of new matter.
Did Bondi hold any government advisory roles?
Yes, he served as Chief Scientific Adviser to the Ministry of Defence from 1971 to 1977 and to the Department of Energy from 1977 to 1980.
Achievements
- Knight Commander of the Order of the British Empire — 1973
- Affiliated with King's College London, British Admiralty Office and Trinity College
- Educated at Trinity College and University of Cambridge
- Worked as mathematician, astronomer and university teacher
